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Poster: tracey pooh Date: Sep 18, 2005 10:15am
Forum: movies Subject: Re: getting video files to stream

Hi Dave,

so there i'm a little less knowledgable...
but i *think* WMV is similar to AVI/MOV in that
it can have many different formats under the wrapper
(so it might depend on a case-by-case basis).

but yes, i've certainly seen some WMV files "stream"
and start playing w/o fully downloading (and i *think*
i've seen WMV files want to download fully).
however, i have a few computers, and as a parttime
amateur digi filmmaker, i tend to avoid WMV and
opt for MPEG1/MPEG2 and motion-JPEG instead.

one of these days, the archive could work towards
more "automatic creation of .mp4 files" for a wider
range of formats... we'll see.


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Poster: IPTV Date: Sep 18, 2005 10:57am
Forum: movies Subject: Re: getting video files to stream

I don't profess to be much of a technical expert on the subject, but my experience is that if the .wmv file simply downloads at a faster rate than it plays out, it will begin to play (stream) after only a portion of the file has actually downloaded (hence the moniker "partial download".) I've seen high data rate .WMVs stall on DSL lines and not begin playing until the entire file was downloaded, but I usually experience "streaming" of almost any file type on my cable modem unless the server is running slow (and this has happend recently on stuff coming from the Internet Archive that was "streaming" ok before).

I'd actually prefer to see .wmv files listed under the "Streaming" heading if that's not incorrect from a practical point of view, even if it's not technically quite correct. I'm going to poke around a little to see if I can learn a little more about the quirks of this format. I really doubt there's any ambivalence about the file structure of Windows Media Video files, but maybe someone smarter than me can enlighten us about that.

Regarding formats: MPEG2 always looks reasonably good, but won't "stream" unless you've got a really fast connection. RealVideo is a bit more of a pain to set up. Although I'm not a "Microsoft Hater", I have no reason to prefer .wmv files other than the fact that they look pretty good and are easy to make, easy to post and easy to download. Do you know if the Internet Archive is looking ahead to dealing with HD video in Windows Media 9, or another format?

Regarding .mp4 files: I've seen some *really* nice looking ones lately, some which compare quite favorably to MPEG2 or even DV. But most (all?) of the ones I've seen on Internet Archive actually look pretty crummy. Any idea what's going on there?


This post was modified by IPTV on 2005-09-18 17:52:10

This post was modified by IPTV on 2005-09-18 17:57:41